identifier 'CALENDAR.EVENT' must be declared

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Compiling APPCORE_TO_CALENDAR trigger on form... 
Compilation error on APPCORE_TO_CALENDAR trigger on form: 
PL/SQL ERROR 201 at line 1, column 1 
identifier 'CALENDAR.EVENT' must be declared 
PL/SQL ERROR 0 at line 1, column 1 
Statement ignored
====== 


 Compile the GLOBE.pll located in the resource directory 
 Compile APPSTAND.fmb located in resource directory 

Then Compile relevant form..